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Altera_Forum's avatar
Altera_Forum
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15 years ago

legacy support freeze PCIe

I'm try to implement legacy interrupt support in Arria 2 GX. MSI-X working good. But when I try to generate legacy interrupt it's freeze whole PC. I'm use only two signals from PCIe core. Inpu...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I think that the second app_int_ack is the problem, it assert to soon. This means the pcie ip send deassert_inta message right after assert_inta message, a small pulse high of inta may not interrupt the system. Maybe it's a bug of pcie ip core, even the app_int_sts remains high, the app_int_ack will go high twice in a very small period.